Hey everyone i want to get a cathode light(4 in.) to put under my JBL Creature Speakers. I just want the cathode to go under the subwoofer. My question is how much voltage does a cathode need? I searched around and found 12 volts inverter...but i'm not putting the cathode in my computer...the link above shows the speakers specs. Can i hook up the wires inside the subwoofer? The problem is that i dont want to hook it up to a power box thats in computers.